Two studies investigated the role of the Dark Triad traits (i.e., narcissism, psychopathy, and Machiavellianism), conscientiousness, and intelligence on leadership role occupancy and hiring decisions in Indonesian culture, which is a collectivist culture. Study 1 used generalized linear model to examine two groups of participants with (i.e., school principals) and without (i.e., teachers) significant leadership responsibilities by controlling for participant grouping by school. The results indicated that, in comparison with teachers, school principals had significantly higher narcissism and conscientiousness and lower psychopathy and intelligence. In Study 2, video recordings of simulated job interviews of 133 undergraduates were evaluated by 133 professional recruiters. Interviewee narcissism was the only significant positive predictor for hiring decision. Both studies provide consistent evidence that narcissism is a significant positive factor in both leadership role occupancy and hiring decision in a collectivist culture.

This study used a behavioural ecological approach by observing whether solitary and social smoking varied as a function of gender and stress. In sample 1 ( N = 414), the result was consistent with the tend-and-befriend hypothesis, in that more female smokers were observed to engage in social smoking during high stress. When the number of smokers observed by stress condition was controlled for in sample 2 ( N = 587), this effect was non-significant. Effect sizes were small for both samples. Discrepancies with previous research suggest that self-reported data might overestimate the interaction of various psychosocial factors on smoking behaviours.